Critical conditions associated with the blockage of blood vessels are one of the primary health concerns worldwide. The main objective of emergency assistance in such conditions is to effectively implement thrombolysis, i.e. to quickly dissolve the clot. To this end, scientists from ITMO University in cooperation with Mariinsky Hospital in Saint Petersburg have developed a magnetically controlled drug that can be condensed on a blood clot by means of a magnetic field. The new drug is safe for intravenous injection and can dissolve clots up to 4000 times more efficiently than ordinary enzyme-based drugs.